Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d058ef20bf2c64…

MALICIOUS

PDF

83.0 KB Created: 2021-03-10 07:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b74be2f00cb825199f64a9ddccdbed80 SHA-1: 3f1db3b1488c319fefd8a1eea6e1890edfb67f85 SHA-256: a5d058ef20bf2c643de396e695fd47dc8f51c545724397c6928a92571cfe3ce3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a financial or economic topic, aligning with the URL's keyword. No scripts were extracted, but the presence of external URIs and the overall detection suggest the file is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wb?keyword=how%20to%20work%20out%20percentage%20change%20in%20real%20gdp%20per%20capita PDF link annotation
    • http://dupuladusudired.mypressonline.com/what_is_the_best_50_gallon_gas_water_heater.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/lodomopib.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/7orjih8/wood_block_puzzle_classic_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/ijbgjii/tiny_space_program_mod_apk_revdl.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/64181705778.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/87754796057.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/how_to_i_verify_texas_medicaid_eligibility_online.pdfIn PDF document text
    • http://rumepado.mypressonline.com/88468203210.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/26887870253.pdfIn PDF document text
    • http://www.harperIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winimoviwimi.myartsonline.com/alternativas_al_neoliberalismo_en_america_latina.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/duncan_laurence_arcade_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/damaged_2014_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/clustering_in_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/46219109553.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/carmilla_espaol_completo_gratis.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/hp_prime_graphing_calculator_precio.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/cover_letter_template_business_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/woxomuzujajuzejitud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C0 5276 bytes
SHA-256: 44b7bb0a5d0fb4c5496eef75044dad642265d73249e9ea76148080c510ac8467
font_01_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 11232 bytes
SHA-256: 895f9d00e0981c83150760878a8234aded7ee8abb8ee0772e575f25a57969cef

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